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Introduction

The succesfull complete denture therapy could benefit, in case of xerostomic patient, from studies on wettability of denture base materials with natural or artificial saliva.

Objectives

This in vitro investigation represents a starting point for the use of different methods to improve the hydrophilicity of denture-saliva system, which could increase the quality of life for the xerostomic pactient. Our objective is the evaluation of 4 moulding-type and 1 injection type denture base resins regarding their wetting capabilities with natural and artificial saliva.

Material and Methods

Six unpolished plates of PMMA resin were produced by different labs. The first lab used Eco-Cryl-Hot (Protechno, Spain) and Acry-Pol-R (Ruthinium, Germany), while the second lab utilized BMS 014 (BMS Dental, Italy) and Superacryl (Spofa, Czech Republic). Two different labs produced each one plate of Polyan (Bredent, Germany). The plates were cut in 10x10mm samples. Wettability was expressd after the measurement of the contact angle of unstimulated natural saliva and artificial saliva (Xerostom, Biocosmetics Laboratoires, Spain). The measurement was performed using CAM 101 system (KSV Intruments, Finland) which calculated the mean contact angle for 3 different sesile drops. The measurement system was set to read 20 contact angle values, at 1 second interval, exposing the dynamic nature of the phenomenon. The statistical analysis was performed with SPSS for Windows, v.10.0.1.

Conclusions

In the condition of the current in vitro experiment, artificial saliva seems to be more efective for the xerostomic denture wearer, while the measurements for the injection type are less variable, indicating a uniform surface. Further improvement of acrylic surface could improve the condition of xerostomic patient.